It needed to be a narrow radiator to fit in the bottom of the case with 25mm fans. I've got a few options, from some noctua's and either try my akasa apache or viper. The akasa fans are PWM and drop as low as 700-900 rpm and the viper will hit 1800 rpm i think. I have two Apaches, and two Noctua's (NF p12). And one viper.

I think higher fins per inch = higher air flow fans are better but therefore noisier but the sales chuff did say quiet operation...

The Black Ice® GT Stealth 360 is the first true next generation triple fan PC radiator designed for uncompromising performance and stealth silent operation

Your going to need something nice in CFM's. It's a good rad when you "need the space" but you gotta tie it up with the right fans. Or at lease a fan controller to "silent" the crazy fans.

I'd go with BitFenix Spectre if you can find them in your "shipping"..

Link me the "vipers" I forget which ones those are...

The Noc's do push a good amount of air... they would be my best bet for what you have now.. If you don't want to spend the money for the Bitfenix... There really isn't tooo much of a difference between the Noc's and the Bits...

Well, I went ahead and installed. I leak tested for a couple of hours using the psu bridge so no mobo power. I'm running it live now but it's under surveillance. Not a drop of water though. Thing took a while to bleed!

I've got two apache's and a viper on pull and it's already cooler and quieter than my megalem on push pull with apache/viper.

I'll tart her up soon enough but for now, this is ugly cooling but it is water cooling

Well, I went ahead and installed. I leak tested for a couple of hours using the psu bridge so no mobo power. I'm running it live now but it's under surveillance. Not a drop of water though. Thing took a while to bleed!

I've got two apache's and a viper on pull and it's already cooler and quieter than my megalem on push pull with apache/viper.

I'll tart her up soon enough but for now, this is ugly cooling but it is water cooling

I've just run Prime 95 for over an hour with i7 920 at 3.6Ghz and 1.34v (HT off). Given I have a C0 stepping model, not the fabled D0 are these temps okay?

Core 1 only bumped about over 60 degrees and the remaining cores stayed under 60. At no time would i consider the system loud - Even kept the D5 pump at setting 2. It's about a 20 degree delta from idle.

Would i get a better cooling effect putting the fans under the rad and blowing through them, as opposed to the set up i've got (pulling air)?

I've just run Prime 95 for over an hour with i7 920 at 3.6Ghz and 1.34v (HT off). Given I have a C0 stepping model, not the fabled D0 are these temps okay?

Core 1 only bumped about over 60 degrees and the remaining cores stayed under 60. At no time would i consider the system loud - Even kept the D5 pump at setting 2. It's about a 20 degree delta from idle.

Would i get a better cooling effect putting the fans under the rad and blowing through them, as opposed to the set up i've got (pulling air)?

I'd have to say the pump is definitely in audible at position 2. Even more so as it sits inside the gutted hard drive rack.

On a side note, I've flipped the rad and fans so the fans are under the radiator sucking on cold air and blowing it through. I thought it might make a bit more noise as the fin density is quite high but the noise is the same and temps are down 1-2 degrees (with less fan rpm).

Moved up to 3.7Ghz and had same if not fractionally lower temps with this radiator set up. I'll stick at that I think.